buhls ubhls bhuls hbuls uhbls hubls bulhs ublhs bluhs lbuhs ulbhs lubhs bhlus hblus blhus lbhus hlbus lhbus uhlbs hulbs ulhbs luhbs hlubs lhubs buhsl ubhsl bhusl hbusl uhbsl hubsl bushl ubshl bsuhl sbuhl usbhl subhl bhsul hbsul bshul sbhul hsbul shbul uhsbl husbl ushbl suhbl hsubl shubl bulsh ublsh blush lbush ulbsh lubsh buslh ubslh bsulh sbulh usblh sublh blsuh lbsuh bsluh sbluh lsbuh slbuh ulsbh lusbh uslbh sulbh lsubh slubh bhlsu hblsu blhsu lbhsu hlbsu lhbsu bhslu hbslu bshlu sbhlu hsblu shblu blshu lbshu bslhu sblhu lsbhu slbhu hlsbu lhsbu hslbu shlbu lshbu slhbu uhlsb hulsb ulhsb luhsb hlusb lhusb uhslb huslb ushlb suhlb hsulb shulb ulshb lushb uslhb sulhb lsuhb sluhb hlsub lhsub hslub shlub lshub slhub
Note: these 'words' (valid or invalid) are all the permutations of the word buhls. These words are obtained by scrambling the letters in buhls.